foo.c:3:6: warning: return type of 'main' is not 'int' [-Wmain]
 void main()
      ^~~~
foo.c: In function 'Jc':
foo.c:26:22: warning: unused variable 'zhi' [-Wunused-variable]
  int i,count=1,chu=1,zhi,nn,aa;
                      ^~~
foo.c: In function 'main':
foo.c:6:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ^~~~~~~~~~~~~~

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